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revert between 56095 -> 55830 in arch
[AROS.git] / workbench / libs / mesa / src / gallium / drivers / softpipe / sp_prim_vbuf.c
blobc60249dbfbcde20ef3d81e450144ce1067664794
1 /**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 /**
29 * Interface between 'draw' module's output and the softpipe rasterizer/setup
30 * code. When the 'draw' module has finished filling a vertex buffer, the
31 * draw_arrays() functions below will be called. Loop over the vertices and
32 * call the point/line/tri setup functions.
33 *
34 * Authors
35 * Brian Paul
36 */
37
38
39 #include "sp_context.h"
40 #include "sp_setup.h"
41 #include "sp_state.h"
42 #include "sp_prim_vbuf.h"
43 #include "draw/draw_context.h"
44 #include "draw/draw_vbuf.h"
45 #include "util/u_memory.h"
46 #include "util/u_prim.h"
47
48
49 #define SP_MAX_VBUF_INDEXES 1024
50 #define SP_MAX_VBUF_SIZE 4096
51
52 typedef const float (*cptrf4)[4];
53
54 /**
55 * Subclass of vbuf_render.
56 */
57 struct softpipe_vbuf_render
58 {
59 struct vbuf_render base;
60 struct softpipe_context *softpipe;
61 struct setup_context *setup;
62
63 uint prim;
64 uint vertex_size;
65 uint nr_vertices;
66 uint vertex_buffer_size;
67 void *vertex_buffer;
68 };
69
70
71 /** cast wrapper */
72 static struct softpipe_vbuf_render *
73 softpipe_vbuf_render(struct vbuf_render *vbr)
74 {
75 return (struct softpipe_vbuf_render *) vbr;
76 }
77
78
79 /** This tells the draw module about our desired vertex layout */
80 static const struct vertex_info *
81 sp_vbuf_get_vertex_info(struct vbuf_render *vbr)
82 {
83 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
84 return softpipe_get_vbuf_vertex_info(cvbr->softpipe);
85 }
86
87
88 static boolean
89 sp_vbuf_allocate_vertices(struct vbuf_render *vbr,
90 ushort vertex_size, ushort nr_vertices)
91 {
92 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
93 unsigned size = vertex_size * nr_vertices;
94
95 if (cvbr->vertex_buffer_size < size) {
96 align_free(cvbr->vertex_buffer);
97 cvbr->vertex_buffer = align_malloc(size, 16);
98 cvbr->vertex_buffer_size = size;
99 }
100
101 cvbr->vertex_size = vertex_size;
102 cvbr->nr_vertices = nr_vertices;
103
104 return cvbr->vertex_buffer != NULL;
105 }
106
107
108 static void
109 sp_vbuf_release_vertices(struct vbuf_render *vbr)
110 {
111 /* keep the old allocation for next time */
112 }
113
114
115 static void *
116 sp_vbuf_map_vertices(struct vbuf_render *vbr)
117 {
118 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
119 return cvbr->vertex_buffer;
120 }
121
122
123 static void
124 sp_vbuf_unmap_vertices(struct vbuf_render *vbr,
125 ushort min_index,
126 ushort max_index )
127 {
128 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
129 assert( cvbr->vertex_buffer_size >= (max_index+1) * cvbr->vertex_size );
130 (void) cvbr;
131 /* do nothing */
132 }
133
134
135 static boolean
136 sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim)
137 {
138 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
139 struct setup_context *setup_ctx = cvbr->setup;
140
141 sp_setup_prepare( setup_ctx );
142
143 cvbr->softpipe->reduced_prim = u_reduced_prim(prim);
144 cvbr->prim = prim;
145 return TRUE;
146 }
147
148
149 static INLINE cptrf4 get_vert( const void *vertex_buffer,
150 int index,
151 int stride )
152 {
153 return (cptrf4)((char *)vertex_buffer + index * stride);
154 }
155
156
157 /**
158 * draw elements / indexed primitives
159 */
160 static void
161 sp_vbuf_draw_elements(struct vbuf_render *vbr, const ushort *indices, uint nr)
162 {
163 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
164 struct softpipe_context *softpipe = cvbr->softpipe;
165 const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
166 const void *vertex_buffer = cvbr->vertex_buffer;
167 struct setup_context *setup = cvbr->setup;
168 const boolean flatshade_first = softpipe->rasterizer->flatshade_first;
169 unsigned i;
170
171 switch (cvbr->prim) {
172 case PIPE_PRIM_POINTS:
173 for (i = 0; i < nr; i++) {
174 sp_setup_point( setup,
175 get_vert(vertex_buffer, indices[i-0], stride) );
176 }
177 break;
178
179 case PIPE_PRIM_LINES:
180 for (i = 1; i < nr; i += 2) {
181 sp_setup_line( setup,
182 get_vert(vertex_buffer, indices[i-1], stride),
183 get_vert(vertex_buffer, indices[i-0], stride) );
184 }
185 break;
186
187 case PIPE_PRIM_LINE_STRIP:
188 for (i = 1; i < nr; i ++) {
189 sp_setup_line( setup,
190 get_vert(vertex_buffer, indices[i-1], stride),
191 get_vert(vertex_buffer, indices[i-0], stride) );
192 }
193 break;
194
195 case PIPE_PRIM_LINE_LOOP:
196 for (i = 1; i < nr; i ++) {
197 sp_setup_line( setup,
198 get_vert(vertex_buffer, indices[i-1], stride),
199 get_vert(vertex_buffer, indices[i-0], stride) );
200 }
201 if (nr) {
202 sp_setup_line( setup,
203 get_vert(vertex_buffer, indices[nr-1], stride),
204 get_vert(vertex_buffer, indices[0], stride) );
205 }
206 break;
207
208 case PIPE_PRIM_TRIANGLES:
209 for (i = 2; i < nr; i += 3) {
210 sp_setup_tri( setup,
211 get_vert(vertex_buffer, indices[i-2], stride),
212 get_vert(vertex_buffer, indices[i-1], stride),
213 get_vert(vertex_buffer, indices[i-0], stride) );
214 }
215 break;
216
217 case PIPE_PRIM_TRIANGLE_STRIP:
218 if (flatshade_first) {
219 for (i = 2; i < nr; i += 1) {
220 /* emit first triangle vertex as first triangle vertex */
221 sp_setup_tri( setup,
222 get_vert(vertex_buffer, indices[i-2], stride),
223 get_vert(vertex_buffer, indices[i+(i&1)-1], stride),
224 get_vert(vertex_buffer, indices[i-(i&1)], stride) );
225
226 }
227 }
228 else {
229 for (i = 2; i < nr; i += 1) {
230 /* emit last triangle vertex as last triangle vertex */
231 sp_setup_tri( setup,
232 get_vert(vertex_buffer, indices[i+(i&1)-2], stride),
233 get_vert(vertex_buffer, indices[i-(i&1)-1], stride),
234 get_vert(vertex_buffer, indices[i-0], stride) );
235 }
236 }
237 break;
238
239 case PIPE_PRIM_TRIANGLE_FAN:
240 if (flatshade_first) {
241 for (i = 2; i < nr; i += 1) {
242 /* emit first non-spoke vertex as first vertex */
243 sp_setup_tri( setup,
244 get_vert(vertex_buffer, indices[i-1], stride),
245 get_vert(vertex_buffer, indices[i-0], stride),
246 get_vert(vertex_buffer, indices[0], stride) );
247 }
248 }
249 else {
250 for (i = 2; i < nr; i += 1) {
251 /* emit last non-spoke vertex as last vertex */
252 sp_setup_tri( setup,
253 get_vert(vertex_buffer, indices[0], stride),
254 get_vert(vertex_buffer, indices[i-1], stride),
255 get_vert(vertex_buffer, indices[i-0], stride) );
256 }
257 }
258 break;
259
260 case PIPE_PRIM_QUADS:
261 /* GL quads don't follow provoking vertex convention */
262 if (flatshade_first) {
263 /* emit last quad vertex as first triangle vertex */
264 for (i = 3; i < nr; i += 4) {
265 sp_setup_tri( setup,
266 get_vert(vertex_buffer, indices[i-0], stride),
267 get_vert(vertex_buffer, indices[i-3], stride),
268 get_vert(vertex_buffer, indices[i-2], stride) );
269
270 sp_setup_tri( setup,
271 get_vert(vertex_buffer, indices[i-0], stride),
272 get_vert(vertex_buffer, indices[i-2], stride),
273 get_vert(vertex_buffer, indices[i-1], stride) );
274 }
275 }
276 else {
277 /* emit last quad vertex as last triangle vertex */
278 for (i = 3; i < nr; i += 4) {
279 sp_setup_tri( setup,
280 get_vert(vertex_buffer, indices[i-3], stride),
281 get_vert(vertex_buffer, indices[i-2], stride),
282 get_vert(vertex_buffer, indices[i-0], stride) );
283
284 sp_setup_tri( setup,
285 get_vert(vertex_buffer, indices[i-2], stride),
286 get_vert(vertex_buffer, indices[i-1], stride),
287 get_vert(vertex_buffer, indices[i-0], stride) );
288 }
289 }
290 break;
291
292 case PIPE_PRIM_QUAD_STRIP:
293 /* GL quad strips don't follow provoking vertex convention */
294 if (flatshade_first) {
295 /* emit last quad vertex as first triangle vertex */
296 for (i = 3; i < nr; i += 2) {
297 sp_setup_tri( setup,
298 get_vert(vertex_buffer, indices[i-0], stride),
299 get_vert(vertex_buffer, indices[i-3], stride),
300 get_vert(vertex_buffer, indices[i-2], stride) );
301 sp_setup_tri( setup,
302 get_vert(vertex_buffer, indices[i-0], stride),
303 get_vert(vertex_buffer, indices[i-1], stride),
304 get_vert(vertex_buffer, indices[i-3], stride) );
305 }
306 }
307 else {
308 /* emit last quad vertex as last triangle vertex */
309 for (i = 3; i < nr; i += 2) {
310 sp_setup_tri( setup,
311 get_vert(vertex_buffer, indices[i-3], stride),
312 get_vert(vertex_buffer, indices[i-2], stride),
313 get_vert(vertex_buffer, indices[i-0], stride) );
314 sp_setup_tri( setup,
315 get_vert(vertex_buffer, indices[i-1], stride),
316 get_vert(vertex_buffer, indices[i-3], stride),
317 get_vert(vertex_buffer, indices[i-0], stride) );
318 }
319 }
320 break;
321
322 case PIPE_PRIM_POLYGON:
323 /* Almost same as tri fan but the _first_ vertex specifies the flat
324 * shading color.
325 */
326 if (flatshade_first) {
327 /* emit first polygon vertex as first triangle vertex */
328 for (i = 2; i < nr; i += 1) {
329 sp_setup_tri( setup,
330 get_vert(vertex_buffer, indices[0], stride),
331 get_vert(vertex_buffer, indices[i-1], stride),
332 get_vert(vertex_buffer, indices[i-0], stride) );
333 }
334 }
335 else {
336 /* emit first polygon vertex as last triangle vertex */
337 for (i = 2; i < nr; i += 1) {
338 sp_setup_tri( setup,
339 get_vert(vertex_buffer, indices[i-1], stride),
340 get_vert(vertex_buffer, indices[i-0], stride),
341 get_vert(vertex_buffer, indices[0], stride) );
342 }
343 }
344 break;
345
346 default:
347 assert(0);
348 }
349 }
350
351
352 /**
353 * This function is hit when the draw module is working in pass-through mode.
354 * It's up to us to convert the vertex array into point/line/tri prims.
355 */
356 static void
357 sp_vbuf_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
358 {
359 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
360 struct softpipe_context *softpipe = cvbr->softpipe;
361 struct setup_context *setup = cvbr->setup;
362 const unsigned stride = softpipe->vertex_info_vbuf.size * sizeof(float);
363 const void *vertex_buffer =
364 (void *) get_vert(cvbr->vertex_buffer, start, stride);
365 const boolean flatshade_first = softpipe->rasterizer->flatshade_first;
366 unsigned i;
367
368 switch (cvbr->prim) {
369 case PIPE_PRIM_POINTS:
370 for (i = 0; i < nr; i++) {
371 sp_setup_point( setup,
372 get_vert(vertex_buffer, i-0, stride) );
373 }
374 break;
375
376 case PIPE_PRIM_LINES:
377 for (i = 1; i < nr; i += 2) {
378 sp_setup_line( setup,
379 get_vert(vertex_buffer, i-1, stride),
380 get_vert(vertex_buffer, i-0, stride) );
381 }
382 break;
383
384 case PIPE_PRIM_LINE_STRIP:
385 for (i = 1; i < nr; i ++) {
386 sp_setup_line( setup,
387 get_vert(vertex_buffer, i-1, stride),
388 get_vert(vertex_buffer, i-0, stride) );
389 }
390 break;
391
392 case PIPE_PRIM_LINE_LOOP:
393 for (i = 1; i < nr; i ++) {
394 sp_setup_line( setup,
395 get_vert(vertex_buffer, i-1, stride),
396 get_vert(vertex_buffer, i-0, stride) );
397 }
398 if (nr) {
399 sp_setup_line( setup,
400 get_vert(vertex_buffer, nr-1, stride),
401 get_vert(vertex_buffer, 0, stride) );
402 }
403 break;
404
405 case PIPE_PRIM_TRIANGLES:
406 for (i = 2; i < nr; i += 3) {
407 sp_setup_tri( setup,
408 get_vert(vertex_buffer, i-2, stride),
409 get_vert(vertex_buffer, i-1, stride),
410 get_vert(vertex_buffer, i-0, stride) );
411 }
412 break;
413
414 case PIPE_PRIM_TRIANGLE_STRIP:
415 if (flatshade_first) {
416 for (i = 2; i < nr; i++) {
417 /* emit first triangle vertex as first triangle vertex */
418 sp_setup_tri( setup,
419 get_vert(vertex_buffer, i-2, stride),
420 get_vert(vertex_buffer, i+(i&1)-1, stride),
421 get_vert(vertex_buffer, i-(i&1), stride) );
422 }
423 }
424 else {
425 for (i = 2; i < nr; i++) {
426 /* emit last triangle vertex as last triangle vertex */
427 sp_setup_tri( setup,
428 get_vert(vertex_buffer, i+(i&1)-2, stride),
429 get_vert(vertex_buffer, i-(i&1)-1, stride),
430 get_vert(vertex_buffer, i-0, stride) );
431 }
432 }
433 break;
434
435 case PIPE_PRIM_TRIANGLE_FAN:
436 if (flatshade_first) {
437 for (i = 2; i < nr; i += 1) {
438 /* emit first non-spoke vertex as first vertex */
439 sp_setup_tri( setup,
440 get_vert(vertex_buffer, i-1, stride),
441 get_vert(vertex_buffer, i-0, stride),
442 get_vert(vertex_buffer, 0, stride) );
443 }
444 }
445 else {
446 for (i = 2; i < nr; i += 1) {
447 /* emit last non-spoke vertex as last vertex */
448 sp_setup_tri( setup,
449 get_vert(vertex_buffer, 0, stride),
450 get_vert(vertex_buffer, i-1, stride),
451 get_vert(vertex_buffer, i-0, stride) );
452 }
453 }
454 break;
455
456 case PIPE_PRIM_QUADS:
457 /* GL quads don't follow provoking vertex convention */
458 if (flatshade_first) {
459 /* emit last quad vertex as first triangle vertex */
460 for (i = 3; i < nr; i += 4) {
461 sp_setup_tri( setup,
462 get_vert(vertex_buffer, i-0, stride),
463 get_vert(vertex_buffer, i-3, stride),
464 get_vert(vertex_buffer, i-2, stride) );
465 sp_setup_tri( setup,
466 get_vert(vertex_buffer, i-0, stride),
467 get_vert(vertex_buffer, i-2, stride),
468 get_vert(vertex_buffer, i-1, stride) );
469 }
470 }
471 else {
472 /* emit last quad vertex as last triangle vertex */
473 for (i = 3; i < nr; i += 4) {
474 sp_setup_tri( setup,
475 get_vert(vertex_buffer, i-3, stride),
476 get_vert(vertex_buffer, i-2, stride),
477 get_vert(vertex_buffer, i-0, stride) );
478 sp_setup_tri( setup,
479 get_vert(vertex_buffer, i-2, stride),
480 get_vert(vertex_buffer, i-1, stride),
481 get_vert(vertex_buffer, i-0, stride) );
482 }
483 }
484 break;
485
486 case PIPE_PRIM_QUAD_STRIP:
487 /* GL quad strips don't follow provoking vertex convention */
488 if (flatshade_first) {
489 /* emit last quad vertex as first triangle vertex */
490 for (i = 3; i < nr; i += 2) {
491 sp_setup_tri( setup,
492 get_vert(vertex_buffer, i-0, stride),
493 get_vert(vertex_buffer, i-3, stride),
494 get_vert(vertex_buffer, i-2, stride) );
495 sp_setup_tri( setup,
496 get_vert(vertex_buffer, i-0, stride),
497 get_vert(vertex_buffer, i-1, stride),
498 get_vert(vertex_buffer, i-3, stride) );
499 }
500 }
501 else {
502 /* emit last quad vertex as last triangle vertex */
503 for (i = 3; i < nr; i += 2) {
504 sp_setup_tri( setup,
505 get_vert(vertex_buffer, i-3, stride),
506 get_vert(vertex_buffer, i-2, stride),
507 get_vert(vertex_buffer, i-0, stride) );
508 sp_setup_tri( setup,
509 get_vert(vertex_buffer, i-1, stride),
510 get_vert(vertex_buffer, i-3, stride),
511 get_vert(vertex_buffer, i-0, stride) );
512 }
513 }
514 break;
515
516 case PIPE_PRIM_POLYGON:
517 /* Almost same as tri fan but the _first_ vertex specifies the flat
518 * shading color.
519 */
520 if (flatshade_first) {
521 /* emit first polygon vertex as first triangle vertex */
522 for (i = 2; i < nr; i += 1) {
523 sp_setup_tri( setup,
524 get_vert(vertex_buffer, 0, stride),
525 get_vert(vertex_buffer, i-1, stride),
526 get_vert(vertex_buffer, i-0, stride) );
527 }
528 }
529 else {
530 /* emit first polygon vertex as last triangle vertex */
531 for (i = 2; i < nr; i += 1) {
532 sp_setup_tri( setup,
533 get_vert(vertex_buffer, i-1, stride),
534 get_vert(vertex_buffer, i-0, stride),
535 get_vert(vertex_buffer, 0, stride) );
536 }
537 }
538 break;
539
540 default:
541 assert(0);
542 }
543 }
544
545 static void
546 sp_vbuf_so_info(struct vbuf_render *vbr, uint primitives, uint vertices)
547 {
548 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
549 struct softpipe_context *softpipe = cvbr->softpipe;
550 unsigned i;
551
552 for (i = 0; i < softpipe->so_target.num_buffers; ++i) {
553 softpipe->so_target.so_count[i] += vertices;
554 }
555
556 softpipe->so_stats.num_primitives_written = primitives;
557 softpipe->so_stats.primitives_storage_needed =
558 vertices * 4 /*sizeof(float|int32)*/ * 4 /*x,y,z,w*/;
559 }
560
561
562 static void
563 sp_vbuf_destroy(struct vbuf_render *vbr)
564 {
565 struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
566 if (cvbr->vertex_buffer)
567 align_free(cvbr->vertex_buffer);
568 sp_setup_destroy_context(cvbr->setup);
569 FREE(cvbr);
570 }
571
572
573 /**
574 * Create the post-transform vertex handler for the given context.
575 */
576 struct vbuf_render *
577 sp_create_vbuf_backend(struct softpipe_context *sp)
578 {
579 struct softpipe_vbuf_render *cvbr = CALLOC_STRUCT(softpipe_vbuf_render);
580
581 assert(sp->draw);
582
583 cvbr->base.max_indices = SP_MAX_VBUF_INDEXES;
584 cvbr->base.max_vertex_buffer_bytes = SP_MAX_VBUF_SIZE;
585
586 cvbr->base.get_vertex_info = sp_vbuf_get_vertex_info;
587 cvbr->base.allocate_vertices = sp_vbuf_allocate_vertices;
588 cvbr->base.map_vertices = sp_vbuf_map_vertices;
589 cvbr->base.unmap_vertices = sp_vbuf_unmap_vertices;
590 cvbr->base.set_primitive = sp_vbuf_set_primitive;
591 cvbr->base.draw_elements = sp_vbuf_draw_elements;
592 cvbr->base.draw_arrays = sp_vbuf_draw_arrays;
593 cvbr->base.release_vertices = sp_vbuf_release_vertices;
594 cvbr->base.set_stream_output_info = sp_vbuf_so_info;
595 cvbr->base.destroy = sp_vbuf_destroy;
596
597 cvbr->softpipe = sp;
598
599 cvbr->setup = sp_setup_create_context(cvbr->softpipe);
600
601 return &cvbr->base;
602 }
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